Question

The perimeter of a semicircular protractor is 108cm. Find the diameter of the protractor..

Answer 1

Answer:

42 cm

Step-by-step explanation:

Perimetet of protector =

Perimeter of semicircle + diameter = pie × R + 2R

(22/7)×R + 2R = 108

(36/7) R = 108

R = 108×7/36

R = 21

Dia = 2 × 21

= 42 cm